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  4. Remote C(sp(3))-H Arylation and Vinylation of N-Alkoxypyridinium Salts to delta-Aryl and delta-Vinyl Alcohols
 
research article

Remote C(sp(3))-H Arylation and Vinylation of N-Alkoxypyridinium Salts to delta-Aryl and delta-Vinyl Alcohols

Bao, Xu  
•
Wang, Qian
•
Zhu, Jieping  
August 13, 2019
Chemistry – A European Journal

The reaction of readily available and bench-stable N-alkoxypyridinium salts with arylboronic and vinylboronic acids afforded delta-aryl and delta-vinyl alcohols, respectively, in the presence of fac-Ir(ppy)(3) and Cu(OTf)(2) dual catalysts. The reaction takes place through a domino process involving the reductive generation of alkoxyl radicals, 1,5-hydrogen atom transfer (1,5-HAT) and the copper-catalyzed cross-coupling reaction of the resulting translocated carbon radicals with boronic acids. Complementary to the Minisci reaction, this method allows for the arylation of nucleophilic alkyl radicals with both electron-rich and electron-poor arenes under mild reaction conditions.

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